Tesoro Logistics Pipeline Spills 20,000 Barrels in North Dakota

Accident Appears to Be the Largest to Date in Bakken Shale Formation

A pipeline owned by Tesoro Logistics LP has leaked more than 20,000 barrels of crude oil into a wheat field in North Dakota, the largest spill in the prolific Bakken shale since the drilling boom started there in 2006.

Tesoro Logistics said Thursday it has shut down the faulty segment of the line and the oil has been contained. The company said the spill happened in a rural area and didn't cause any injuries or pollute water sources....